id summary reporter owner description type status priority milestone component version resolution keywords cc 6415 "Msys on Windows misses header file ""locale""" openmodelica@… Adrian Pop "I tried to compile code of a self-created modelica library with 1.17.0-beta3-64bit Error message: C:\OpenModelica1.17.0-dev.beta3-64bit\tools\msys\mingw64\include\c++\10.2.0\iomanip:44:10: fatal error: 'locale' file not found #include Investigation: - Open msys shell, in my case - C:\OpenModelica1.17.0-dev.beta3-64bit\tools\msys\msys2_shell.cmd - see who owns the ""locale"" header file: - pacman -Qo /mingw64/include/c++/10.2.0/locale - the result is ""/mingw64/include/c++/10.2.0/locale is owned by mingw-w64-x86_64-gcc 10.2.0-5"" - check if it is there - ls /mingw64/include/c++/10.2.0/locale - ls: cannot access '/mingw64/include/c++/10.2.0/locale': No such file or directory So i guess the installer does not ship that file. Let's see if there are more files missing: - pacman -Ql mingw-w64-x86_64-gcc | cut -d"" "" -f2 | grep -ve""/$"" | xargs -n1 ls - except for man-pages which are not essential, locale is the only file missing" defect closed high 1.17.0 Installation program v1.17.0-dev fixed